GENERAL DESCRIPTION

The W91340N series are tone/pluse switchable telephone dialers with ten memories, hold function, and a handfree dialing control circuit. Fabricated using CMOS technology, the W91340N series offer good performance in low-voltage and low-power applications.

FEATURES

• DTMF/pulse switchable dialer

• 32-digit redial memory

• Ten by 16-digit two-touch direct repertory memory

• Cascaded dialing allowed, with unlimited dialing length

• Pulse-to-tone (*/T) keypad for long distance call operation

• Uses 5 x 4 keyboard

• Easy operation with redial, flash, pause, and */T keypads

• Pause, P -> T (pulse-to-tone) can be stored as a digit in memory

• Dialing rate (10 ppS or 20 ppS) is selectable by bonding option

• On-hook debounce time: 150 msec.

• Minimum tone output duration: 93 msec. (W91344AN: 87 mS)

• Minimum intertone pause: 93 msec. (W91344AN: 87 mS)

• Flash break time (73, 100, 300, 600 msec) selectable by keypad; pause time is 1.0 sec.

• Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin

• On-chip power-on reset

• Uses 3.579545 MHz crystal or ceramic resonator

• Packaged in 18 or 20-pin plastic DIP